test: expand route coverage

internal/cli/cli_test.go

@@ -306,6 +306,40 @@ func TestRunRouteHuman(t *testing.T) {
 	}
 }
 
+func TestRunRouteValidationError(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	exitCode := Run([]string{
+		"route",
+		"coffee",
+		"--from", "A",
+		"--to", "B",
+		"--mode", "FLY",
+		"--api-key", "test-key",
+	}, &stdout, &stderr)
+
+	if exitCode != 2 {
+		t.Fatalf("expected validation error exit code 2, got %d", exitCode)
+	}
+}
+
+func TestRunRouteMissingFrom(t *testing.T) {
+	var stdout bytes.Buffer
+	var stderr bytes.Buffer
+
+	exitCode := Run([]string{
+		"route",
+		"coffee",
+		"--to", "B",
+		"--api-key", "test-key",
+	}, &stdout, &stderr)
+
+	if exitCode != 2 {
+		t.Fatalf("expected validation error exit code 2, got %d", exitCode)
+	}
+}
+
 func TestRunDetailsJSON(t *testing.T) {
 	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		if r.URL.Path != "/places/place-1" {

route_test.go

@@ -95,6 +95,25 @@ func TestSampleWaypointsSinglePoint(t *testing.T) {
 	}
 }
 
+func TestSampleWaypointsZeroTotal(t *testing.T) {
+	points := []LatLng{{Lat: 1, Lng: 1}, {Lat: 1, Lng: 1}}
+	waypoints := sampleWaypoints(points, 3)
+	if len(waypoints) != 1 {
+		t.Fatalf("expected 1 waypoint")
+	}
+	if waypoints[0] != points[0] {
+		t.Fatalf("unexpected waypoint: %#v", waypoints[0])
+	}
+}
+
+func TestSampleWaypointsMaxExceedsPoints(t *testing.T) {
+	points := []LatLng{{Lat: 0, Lng: 0}, {Lat: 0, Lng: 0}, {Lat: 0, Lng: 1}}
+	waypoints := sampleWaypoints(points, 5)
+	if len(waypoints) != 2 {
+		t.Fatalf("expected 2 waypoints, got %d", len(waypoints))
+	}
+}
+
 func TestPointAtDistanceBounds(t *testing.T) {
 	points := []LatLng{{Lat: 0, Lng: 0}, {Lat: 0, Lng: 2}}
 	cumulative := cumulativeDistances(points)